4194318domain: NAppears in sequencesNumber of subsets of {1,2,3,...,n} that sum to 0 mod 64.at n=28A068045Number of (n+1) X (3+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nonincreasing x(i,j)-x(i-1,j) in the j direction.at n=20A250737